package cn.single;

/**
 * @author oldliu
 * @since 1.0
 */
public class TestSun {
    public static void main(String[] args) {
//        System.out.println(Sun.getInstance());
//        System.out.println(Sun.getInstance());
//        System.out.println(Sun.getInstance());
        new Thread(()->{
            System.out.println(Sun.getInstance());
        }).start();
        new Thread(()->{
            System.out.println(Sun.getInstance());
        }).start();
    }
}
